Prior to evaluating existing conditions and conducting any analysis, it is important to determine the type of data needed to perform the corridor study. The data types needed vary from project to project. Some data types are readily available on online sources such as the Traffic and Safety Analysis Procedures Manual | 2024 7-6 TxDOT Open Data Portal, TxDOT Project Tracker, STARS II, Texas Natural Resources Information System (TNRIS), Texas Bicycle and Pedestrian Count Exchange, and others. Other data, such as traffic counts, may need to be collected. Check DCP in the STARS II database for the corridor to determine whether the available data is recent and if it can be used for the corridor study. Historical traffic growth is a strong datapoint to determine future traffic. Traffic counts are necessary for the existing conditions analysis and for traffic projections. It is important to have counts conducted at all the necessary locations where data is not available. A Travel Demand Model output (TDM) is a datapoint to determine future traffic and can be obtained from TxDOT or the MPO. Some data sources that TxDOT has access to needs a signed licensing or non-disclosure agreement with TxDOT before receiving access. More information on how different data types are used for corridor studies is presented under

Section 7.3

.